Plate-holding device.



F. W. WESTON. PLATE 30mm@ mmm. APYLIGATION FILED MMLM, 1911.

Patented 0011.28, 1913.

Z SIIBBTS'SHEBT Z.

iggnitr raros.

FOLKEW.- Wns'rora, oF NEW ironie, N. Y., assrononror; wasser.- MANUFACTURING COMPANY, orf BROOKLYN, new rome, a centenario-N or NEW YORK.

PLATE-HOLDING DEV-ICH.y

images.

Serial No, 618,050.

.To all whom t may concern Be it known that I, FoLnn W. VVEsToN, a citizen of the United States, and a. resident o the borough ot' Brooklyn of the city of ew York, inthe State ot New York, have invented certain new and useful Improvements in Plate-l'lolding Devices, ot' which the following a specification.

The invention is directed to new and useiul improvements in devices for holdingl and positioning printing plates, which devices comprise a base and a plate'engaging menr bei* held in lace thereupon by the operating means for t e member.

lt also relates to ay device having a base provided with a, series of parallel slotted portions provided with plate engaging or clamping means that can be readily positioned at any point on the base and which also can be readily removed therefrom.

As Vshowing specific embodiments oi the invention-reference is made to lthe drawings forming a part ot the specification and in whichl Figure l shows in lan a. View of a base having supported tiereupon a printing plate held 1n place by means engaging the plate. Fig. 2 is a vertical sectional view taken on a line 2h42 of Fig. 1 looking in the direction of the arrows. Fig. 3 is an enlarged sectional view showing the relative pos1ton between the screw operating means and the plate engaging member prior to the 'former being drawn into operative position by a pin. Fig. Zl is an enlarged vertical 'seetional view through the slotted portion and showing the operating screw, plaleengaging member, split pin and a portion ot' the base. Fig. 5 shows a sectional register hook embodying one phase ot' the invention, having a rectangular base part of which has been removed and a plate engaging or clamping member in which the pin always remains in place therein. Fig. 6 is an end view of the sectional register hook shown in Fig.4 5. Fig. 7 is a side view of a plate clamping member having a. screw operating member secured in place by a splitpin which cannot be completelyT withdrawn trom the clamping member. Fig. 8 1s ay plan view ot the pm shown in llig. 7. Figs. 9 to l2 are detail views of thethreading mechanism employed :tor cutting the sections of screw 'on the overhanging portion.

edges oi which are provided with sections of screw threaded teeth 4. There is located in the slotted portion a screw operating member 5 and the lower part oit' each of the slotted portions are recessed or cut away suiiiciently to permit this member to move Patented Oct.. 28, 1913.

transversely from engaging position withl the teeth to the bottom of the slot whereby the same will be free to move longitudinally vtherein without engagement with the teeth It will turthe'i'more be observed from an inspection of Fig. il that, the lower portion of the slot is enlarged so that its transverse dimension innncdiately below thc threaded sections is larger than the outside dimension of the screw operating means 5 or larger than the largest diameter of the screw threaded sections in the base thus affording a construction which practically eliminates the clogging of'the slotted portion in the base by ink and dirt, Also extending into the slotf ted portion are the lugs 7 and 8 of the plate engaging or clamping member through which a split pin 9 for holdingjthe screw operating member in operative position passes. The lugs 7 and y8 are preferably the same width as, or at least not wider than the distance `between the adjacent surfaces of the overhanging portion (see Fig. ll) whereby the plate clampingmember can be removed from the b'ase by transverse movement when i'iotlh ld -in place by the pin 9.

In the form slttlwn in Fig. 3 it will be 'observed that both the screw operating member 5 and the pin 9 are beveled and the depth ot'the slots in the base are such that when the plate engaging member (i is 4brought in position over the screw operating member the pin 9 can pass through the openingin the lug 7 pick up the screw op- @rating member and bring it into operative engagement. with the teeth ALand then pass the rest of the way through'th'e opening in the screw operating member to the openinf in the other-lug 8 and in this manner hol the screw operatingmember in place where:

it. can serve as means for holding the clamping member on the base and also as means for positioning the plate engaging or clamping member relative to the base. The movement of the screw operating member 5 is effected by means of a hand operating tool such as is illustrated in Fig. 5. In the form shown in Fig. 3 the split pin 9 can be entirely withdrawn from the plate clamping member at the will of theoperator. structure shown in the modified form illustrated in Figs. T and 8 is substantially the same as thatshotvn in Fig. 3 with the eX- ception that the pin 9a has a recessed portion 9b into which a pin 10 enters and due to this construction the split pin is prevented from being withdrawn entirely from the plate clamping member.

In Figs. 5 and 6 there is disclosed what is known in the trade as a sectional register hook comprising a small base 11 having a slotted portion provided with sections 12 of screw threaded teeth on opposite sides.

A plate clamping or engaging member 13 having lugs or ears 14 and 15 is held in place on the base by the screw operating member 1G. In this register hook it will be observed that the entire thrust from the clamping member or hook 12 is transmitted through the pin 17 and screw member 16 to the base and this a'ords a simple and practical construction and avoids close fits between the clamping member and base as for instance are necessitated by a construction like that shown in my patent for Register hooks ilo.

, 930,582, dated August 10, 1909 in which the thrust from the hook is directly absorbed bythe base and Where the screw operates only as a means for moving the plate engaging member along the slot, and for maintaining it in a certain position therein.

ln Figs. 9 to 12`- there is illustrated the tool which is employed for cutting the sections of screw threaded teethupon opposite sides of the slot.' This tool comprises a frame 18 having secured at its central portion' a tap 19, the cutting portion of whose teeth is spirally arranged in such manner that. the teeth at the forward end of the tap will be in engagement with the metal `in the overhanging portion at one side of the slot while teeth in the same row and at the rearward end of the tap are in engagement with the metal of the overhanging portion at the opposite side of the slot. The teeth of the tap are also so arranged that those which are at the end of one row will be in engagement with the metal at one side ot' the slot while the teeth at the rear end of the succeeding row are in engagement with the metal at the same side of the slot. lt will therefore be apparent that the tap always engages and is cutting metal at opposite sides of the slotted portion and in this manner the chatter which would take The engaging plates 25 which serve as means for regulating and adjusting the position of the tap relative to the work. At the opposite ends ot the longitudinally'extending member there are detachably secured by means of screws 26 the' guide member 27 arranged so as to ent-er the slotted portion to be tapped or operated upon and these guide members serve as means for maintaining the work and tool in the proper relative position' to each other during the travel of the frame over the Work. i

In order to carry 'out the proper cutting of the teeth it is apparent that the connections between the tap and the frame must be such that the tap can be firmly held in position against the work and at a definite distance from the outer surface of the base. i

It is obvious that various forms and modifications may be made both in the devices for holding and positioning a printing plate and also in the apparatus and manner o making the screw threaded portions therein without departing from the spirit and scope of my invention.

I claim as my invention:

1. ln devices of the class described the combination of a base having a longitudinally extending slotted portion provided with overhanging portions adapted to be engaged by an operating and holding means inthe slotted portion, operating and hold'- having ear portions entering the slot whosewidth is not greater than the transverse dimension between the adjacent surfaces of the overhanging portions whereby when disengaged from the holding means the clamping member can be removed from the base by a transverse movement relative thereto, the holding means comprising a member that simultaneously engages under sides of the overhanging portions at opposite sides of the slotted portion.

2. In a device of the class described the combination of a base having a longitudinally extending slotted portion provided with overhanging portions having parts of screw threaded teeth thereupon, a screw threaded operating member adapted to mesh with the toothed portion, the slotted portion being so shaped and of sufficient area in cross section as to permit transverse movement of the member to cause disengagement of the teeth and member and as to permit -ing means and a plate clamping member Y tid noi/cees free longitudinal movement ozt the member pest the teeth when the teeth and screw threads are disengaged, and, :i plate chimpe ing Ineens provided with eers of such Width that it een be inserted in vplace on the bese by i transverse movement7 the screw memn ber when held in operative position relative to the hook being in engagement with the teeth of the overhanging portions et opposite sides of the slot.

3. A device of the class described having e bose provided with @longitudinally eX- tendino; slotted portion to receive i screw operating means and provided with teeth, screw operating Ineens, a plete engaging or clamping member provided with eers or lugs of such construction that they can be assembled with the bese'by e movement transverse to the slotted portion and e pin, the slottedl portion and screw means being so proportioned that the hitter edn move transversely from opcrting' position to zi position Where it een be slid along the slot without engagement of the screw threads with teeth on the slotted portion, the screw n'iemberI having a central holev therein andv the eers having holes through which the pin een pass to hold the screw in operative position, thev pin sind the screw member having tapered or beveled portion or portions so that when the plate engaging member is in proper position relative to the screw the letter will be drawn into operative position by pes-sing the pin longitudinally through the holes in the lng.

et. The combination of :i bese provided with teeth and having i longitudinnlly eis;- tending slotted portiom e plete engaging member having lugs entering the siotted portion, :i screw operating member constrneted'so 'es to mesh with the teeth, and e slideble pin carried in the lugs sind -prevented from being removed entirely there from by stop ineens., seid pin orrenged to hold the screw means in operative position reletive to Athe ings.. i

i 5. in t device otthe class described the eoinbinetion et o slotted bdsm o screw mem bei' end o plete engegin'gjmeinber bovine; eers entering e slot in the bose the slotted bese portions having teethi with which the screw member engages, thegeers constructed so Athat they een hold therebetween e. screw member, the width of the eers being; such that the piste engaging member con be removed 5t from the bose b v e transverse movement relative thereto.

G. In :t device oit the cines described the combinetion of o, base having; slotted por tions provided with overbtu'iging' Sides ott having integral therewith sections of screw-- threads termineting short of the bottom ot the slots7 each of' seid slotted portions bevine,1 :in enlarged portion :it the bottom. Whose transverse interior dimension is great-ter than the largest diameter of the screw-thread sec-- tions and seid enlorged portion being; sutieientljv large to permit :i screw which en scre\\'threiid serions to move along. seid sloi'xted portion when thc screw is disengnged from seid threiids. p

i". in o device oi. the close described the combination of n screw operating member end :t bose bovino; slotted p ,tions pro-i vided with overbourging` side", seid ove itt? hanging sides lniving` integre-l with sections of screw threat" notingI short ot the bottom ot the sl( e of the sections oi screw thrczids ini-ving it full depth of tooth from end to end of the @it section, the screw operating member normally engaging' said screw-threads and the overlienging portions :it the sides of the slot providing;1 e crfieemnce splice between the screw sind. base for the reception or collec tion of ink, dirt or the like which would otherwise obstriict the movement ot the screw.

8. lfn n device ci the class described the combination of e screw operating member and. s' bese having :in inverted tshoped siot provided et the junction ot the ci" end oit the horizontal portions ond the loner end ot' the vertical portions with sectie s ot' screw threads forming series ot teeth t* integral with the bese, seid serevvineinber when in operating position engeigingg seid sections of screvi7 threads end 'the bo inontzil portion of the lisheped siot bein@n greet-er then the die-meter ot the screw member, thon ettording e receiving; spsice iter muy doet or dirt that may collect in the siotted portion.

This specicetion signed end witnessed this 28th dey ot Merch A. D? ltt.

FLKE W. "W lri'il'i. Signed in the presence otn CHARLES A. UGREN, Mariano WV. Kroatie.

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